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- from test_support import TestFailed, verbose
- import struct
- ## import pdb
-
- def simple_err(func, *args):
- try:
- apply(func, args)
- except struct.error:
- pass
- else:
- raise TestFailed, "%s%s did not raise struct.error" % (
- func.__name__, args)
- ## pdb.set_trace()
-
- simple_err(struct.calcsize, 'Q')
-
- sz = struct.calcsize('i')
- if sz * 3 <> struct.calcsize('iii'):
- raise TestFailed, 'inconsistent sizes'
-
- fmt = 'cbxxxxxxhhhhiillffd'
- fmt3 = '3c3b18x12h6i6l6f3d'
- sz = struct.calcsize(fmt)
- sz3 = struct.calcsize(fmt3)
- if sz * 3 <> sz3:
- raise TestFailed, 'inconsistent sizes (3*%s -> 3*%d = %d, %s -> %d)' % (
- `fmt`, sz, 3*sz, `fmt3`, sz3)
-
- simple_err(struct.pack, 'iii', 3)
- simple_err(struct.pack, 'i', 3, 3, 3)
- simple_err(struct.pack, 'i', 'foo')
- simple_err(struct.unpack, 'd', 'flap')
- s = struct.pack('ii', 1, 2)
- simple_err(struct.unpack, 'iii', s)
- simple_err(struct.unpack, 'i', s)
-
- c = 'a'
- b = 1
- h = 255
- i = 65535
- l = 65536
- f = 3.1415
- d = 3.1415
-
- for prefix in ('', '@', '<', '>', '=', '!'):
- for format in ('xcbhilfd', 'xcBHILfd'):
- format = prefix + format
- if verbose:
- print "trying:", format
- s = struct.pack(format, c, b, h, i, l, f, d)
- cp, bp, hp, ip, lp, fp, dp = struct.unpack(format, s)
- if (cp <> c or bp <> b or hp <> h or ip <> i or lp <> l or
- int(100 * fp) <> int(100 * f) or int(100 * dp) <> int(100 * d)):
- # ^^^ calculate only to two decimal places
- raise TestFailed, "unpack/pack not transitive (%s, %s)" % (
- str(format), str((cp, bp, hp, ip, lp, fp, dp)))
-
- # Test some of the new features in detail
-
- # (format, argument, big-endian result, little-endian result, asymmetric)
- tests = [
- ('c', 'a', 'a', 'a', 0),
- ('xc', 'a', '\0a', '\0a', 0),
- ('cx', 'a', 'a\0', 'a\0', 0),
- ('s', 'a', 'a', 'a', 0),
- ('0s', 'helloworld', '', '', 1),
- ('1s', 'helloworld', 'h', 'h', 1),
- ('9s', 'helloworld', 'helloworl', 'helloworl', 1),
- ('10s', 'helloworld', 'helloworld', 'helloworld', 0),
- ('11s', 'helloworld', 'helloworld\0', 'helloworld\0', 1),
- ('20s', 'helloworld', 'helloworld'+10*'\0', 'helloworld'+10*'\0', 1),
- ('b', 7, '\7', '\7', 0),
- ('b', -7, '\371', '\371', 0),
- ('B', 7, '\7', '\7', 0),
- ('B', 249, '\371', '\371', 0),
- ('h', 700, '\002\274', '\274\002', 0),
- ('h', -700, '\375D', 'D\375', 0),
- ('H', 700, '\002\274', '\274\002', 0),
- ('H', 0x10000-700, '\375D', 'D\375', 0),
- ('i', 70000000, '\004,\035\200', '\200\035,\004', 0),
- ('i', -70000000, '\373\323\342\200', '\200\342\323\373', 0),
- ('I', 70000000L, '\004,\035\200', '\200\035,\004', 0),
- ('I', 0x100000000L-70000000, '\373\323\342\200', '\200\342\323\373', 0),
- ('l', 70000000, '\004,\035\200', '\200\035,\004', 0),
- ('l', -70000000, '\373\323\342\200', '\200\342\323\373', 0),
- ('L', 70000000L, '\004,\035\200', '\200\035,\004', 0),
- ('L', 0x100000000L-70000000, '\373\323\342\200', '\200\342\323\373', 0),
- ('f', 2.0, '@\000\000\000', '\000\000\000@', 0),
- ('d', 2.0, '@\000\000\000\000\000\000\000',
- '\000\000\000\000\000\000\000@', 0),
- ('f', -2.0, '\300\000\000\000', '\000\000\000\300', 0),
- ('d', -2.0, '\300\000\000\000\000\000\000\000',
- '\000\000\000\000\000\000\000\300', 0),
- ]
-
- def badpack(fmt, arg, got, exp):
- return
-
- def badunpack(fmt, arg, got, exp):
- return "unpack(%s, %s) -> (%s,) # expected (%s,)" % (
- `fmt`, `arg`, `got`, `exp`)
-
- isbigendian = struct.pack('=h', 1) == '\0\1'
-
- for fmt, arg, big, lil, asy in tests:
- if verbose:
- print `fmt`, `arg`, `big`, `lil`
- for (xfmt, exp) in [('>'+fmt, big), ('!'+fmt, big), ('<'+fmt, lil),
- ('='+fmt, isbigendian and big or lil)]:
- res = struct.pack(xfmt, arg)
- if res != exp:
- raise TestFailed, "pack(%s, %s) -> %s # expected %s" % (
- `fmt`, `arg`, `res`, `exp`)
- n = struct.calcsize(xfmt)
- if n != len(res):
- raise TestFailed, "calcsize(%s) -> %d # expected %d" % (
- `xfmt`, n, len(res))
- rev = struct.unpack(xfmt, res)[0]
- if rev != arg and not asy:
- raise TestFailed, "unpack(%s, %s) -> (%s,) # expected (%s,)" % (
- `fmt`, `res`, `rev`, `arg`)
-